Nut-lock.



o. E. MOORE. NUTLooK.

` Patented Dec.27, 1910.

OTIS E. MOORE, OF CHISHOLM, MINNESOTA.

Patented Dee. 2?, 1910.

Serial No. 569,620.

NUT-LOCK.

@@9538.. Specification of Letters Patent.

Application filed June 29, 1910.

To all whom it may concern.'

Be it known that I, Gris E. Moonn, a citizen of the United ,States residing at Chisholm, in the county of St. Louis and State of Minnesota, have invented a new and useful Nut-Look, of which the following is a specification.

My invention relates to nut locks; and the object is to provide a simple yeteffective means for locking a nut to a bolt.

In the accompanying drawing, Figure l is an end view of a bolt with a nut held on it by my improved nut lock. Fig. 2 is a top view of the structure shown in Fig. l. Fig. 3 is a sectional end view of the center web of a railway rail or other bar with adjacent iish-plates and a bolt passed therethrough and provided with a nut and my nut locking means applied thereto. Fig. t is a cross section of the locking pin on line o o. Fig. l. Fig. 5 is a modification of the form shown in Fig. 4;.

Referring to the drawing by reference numerals, l designates a bolt having a nut 2, and a head 8, which in Fig. 3 is shown may be of the round form much in use for railway joints, but it is obvious that the head may be of any desired form.

The end of the bolt is provided with a diametrical slit 1l, or it may have two slits like 4t and 4a in Fig. l, Down into said slit is driven a slightly tapered leg 5 of V-shaped steel staple 5 6, whose leg 6 has its end formed with a hook 7 adapted to be sprung by its arm 6 in over the edge 8 of the nut and prevent its accidental turning in the unscrewing direction.

Usually the nut in being tightened may be given the necessary fract-ion of a turn to bring one of its corners in locking position with the hook 7 still, to insure such locking position even where the nut is to be drawn very tight, I may provide the bolt with two slits, 4C and 4 in Fig. l, one slit being at an angle of about 4:5 degrees from the other slit so that when the nut is fairly tight, and the key 5 6 is inserted in the slit that is in the best position7 the further turning of the nut to make it engage the hook 7 will not exceed 23 degrees on a square nut and will be much less than that on a heXagon nut.

In Fig. 5 is shown that the angular leg 5 may be twisted or otherwise formed in such position to the staple that its sharp edges 9 will out into the sides of the slit in the bolt and in that way prevent the possibility of the keys working toward the end of the bolt. Another means for suoli prevention is to produce a bur, as l0 in Fig. 2 on the bolt near by the leg 5, said bur may be produced by a blow of a light hammer and preferably a punch or calking tool to strike on.

In Fig. 3 11 designates the center web of a railway rail having its sections jointed together by iish-plates 1Q, or il and l2 may represent any parts throughwliich a bolt is passed and provided with a nut locked by my looking device.

llhat l claim is l. In a nut lock, the combination with a bolt having in its threaded end a diametrical slit, a nut on the bolt, a staple-shaped key having one leg adapted to be driven into the said slit, its other leg being springy and provided with a hook adapted to engage and hold the nut against accidental unscrewing.

2. In a nut lock, the combination with a bolt having in its threaded end a diametrioal slit, a nut on the bolt, a staple-shaped key having one leg adapted to be driven into the said slit, its other leg being springy and provided with a hook adapted to engage and hold the nut against accidental unsorewing; said driven leg having sharp ribs adapted to engage in the sides of thel slit.

3. ln a nut lock, the combination with a bolt having in. its threaded end a diametrical slit, a nut on the bolt, a staple-shaped key having one leg adapted to be driven into the said slit, its other leg being springy and provided with a hook adapted to engage and hold the nut against accidental unscrewing; said slit being burred to prevent the driven leg from slipping toward the end of the bolt In testimony whereof l atiiX my signature, in presence of two witnesses.

OTS E. MOORE.

litnesses GEO. K. T1msn, E. H. BARRETT. 

